Hydraulic carriage feed



Sept. 5, 1944. A. v. HUENNEKENS ETAL 2,357,514

HYDRAULIC CARRIAGE FEED Filed NOV. 14, 1942 3 Sheets-Sheet l L INVENTORS3s) v 'H'Alawneluud BY C0175 4' 9L9 ATTORNEY.

Sept. 5, 1944. A. v. HUENNEKENS ET AL 2,357,514

HYDRAULIC CARRIAGE FEED Filed Nov. 14, 1942 3 Sheets-Sheet 2 L I mm M mN a a o y oo 3 I M INVENTgifM MAM! BY ma 7W Aland/ 7 A TTORNEY A. v.HUENNEKENS ETAL I I 2,357,514

Sept. 5, 1944.

HYDRAULIC CARRIAGE FEED 3 Sheets-Sheet 3 Filed Nov. 14, 1942 mm H flm flW d WWW m M 4 w Patented Sept. 5, 1944 HYDRAULIC CARRIAGE FEED V AlphonsV. Huennekens and assignors to Harnischfeger Milwaukee, Wis., a.corporation of 'Milwaukec, Wis.,

Corporation, Wisconsin George L. Gavin,

Application November 14, 1942, Serial'No. 465,588

3 Claims.

The invention. relates to turret lathes.

The object of the invention is to provide a turret lathe in which thefeed of the turret head is hydraulically controlled and is eifected byan hydraulic cylinder which may be advanced or retracted lengthwise ofthe bedunder its own power through its connection with the turret headso that the turret may have different spheres of operation relative tothe lathe bed to accommodate for different sizes and types of work, atthe same time employing an hydraulic cylinder having a strokesubstantially less than the scope of accommodation of said turret onsaid bed. I

The invention further consists in the several features hereinafter setforth and more particularly defined by claims at the conclusion hereof.

In the drawings:

Fig. 1 is a side elevation view of a turret lathe embodying theinvention, parts being broken away and parts being shown in section;

Fig. 2 is an end elevation view of the lathe, parts being broken awayand parts being shown in section;

Fig. 3 is a detail sectional view taken on the line 3-3 of Fig. 2;

Fig. 4 is a detail sectional line 4-4 of Fig. 3;

Fig. 5 is a detail sectional view taken on the line 55 of Fig. 1;

Fig. 6 is a diagrammatic view of the hydraulic system.

In the drawings, the numeral 8 designates the head stock of the latheand 9 the bed having ways l0 along which the carriage of the turret isfree to slide. The carriage I! has the revoluble turret head i2 mountedthereon and adapted to carry various tools, one of which, I3, isindicated in dotted lines in Fig. 1 as a boring tool engageable with thework l4 held in a hyview taken on the nected to an arm 26 formedintegral with or connected to the carriage H. The carriage 2|) may belocked in different positions along the way H! by means of one or morepins 27 mounted in said carriage and adapted to engage in one or morespaced holes 28 in the way I9.

The tool feeding movement of the carriage H is limited by a stop 29which is adjustablysecured in threaded engagement with a bracket 30slidably mounted on the way l9 and adapted to be held in one of aplurality of positions by means of a locking pin 3| mounted in thebracket 30 and adapted to be inserted in one of a series of holes 32 inthe way I9. The locking pin 3| is operated by a lever 33 pivotedintermediate its ends at 34 and operatively connected by a pin and slotconnection 35 with the outer end of said pin.

The carriage ll may be locked to the bed of the lathe in differentpositions along the ways It] by means of a clamp 36 havingthreadedengagement with said carriage and clampingly engageable with oneof said ways Ill.

The hydraulic cylinder 23 with the piston 24 is of the double actingtype with the alternate introduction of pressure fluid into the cylinder23 under the control of any suitable reversing draulically operatedchuck l5 mounted on the head stock spindle it which is rotated by asuitable belt and pulley drive connection I 1 with the electric motorl8. As in all turret lathes, while the work is rotating, the tools onthe turret head l2 are successively moved into and out of engagementwith the work with the indexing of the head in its difi'erent positions.

A special way I9 is provided on the front side of the bed 9, and acarriage 20 with suitablegib connections 2| and 22 is slidably mountedon this way and carries an hydraulic cylinder 23 in which a piston 24 isslidably mounted having a piston rod 25 working through a suitablestufling box (not shown) in one end of the cylinder and convalve 31mounted on the carriage 20 and whose operation is manually controlled bya lever 38 mounted on a square shaft 39 carried by the carriage II andslidably keyed to the hub of the reverse valve operating lever 31'. thelever 38 and shaft 39 move with the carriage II, the shaft 39 may movelengthwise relative to carriage 20 during the adjustment of thecarriages II and 20 relative to each other and also during the feed ofthe carriage H by the operation of the piston 25, the lever 38 beingarranged near a feed rate control valve 40 and in convenient reach ofthe operator of the lathe as he stands at the side thereof to direct themovement of the carriage l I.

As shown in Fig. 6 the hydraulic circuit also includes a manuallycontrolled throttle and bypass valve 40 of known construction, aconstant pressure pump 4| adjustable for various pressures, and a sump42. The hydraulic chuck I5 is controlled by a suitable control Valve 43of known construction. Operating fluid is supplied from the sump 42through a pipe-44 to the inlet of the pump 41 which delivers it throughpipes 45 and 46 to the reversing valve 3'! and control valve 43,respectively. Piping 4'! connects the valve 31 and the valve 48 with thefront end of the cylinder 23. A pipe 48 connects the Thus while A with adiametrically disposed slot 55 forming a 7 guide for a cross pin 56 onthe pin 21 to permit said pin 21 to enter the hole 28 or to be withdrawntherefrom until the pin 56 clears the top of said cap 54 where it can berotated at right angles to the slot 55 in which position the pin 21 isclear of the hole 28. t

The chuck l5 and its hydraulic control are of known construction andoperate in known manner to hold the work [4 in the chuck jaws whilebeing operated on by the various tools on the turret head and thereafterrelease the finished work.

With the valve 31 set in position for forward feed the pump 4! deliversthe hydraulic operating fluid through the pipe 48' to' the back end ofthe cylinder 23, thus moving the piston 24 toward the left along withthe carriage II and head l2 to move the tool l3 into the work l4. Thespeed or rate of movement of the carriage is controlled by the propersetting of the throttle valve 40 controlling the release of exhaustfluid from the front end of the cylinder 23 through the pipe 41. Whenthe outer end of the rod 25 strikes the stop 29, the forward feed of thetool I3 is stopped, and then by shifting the valve 31 to its reverseposition the pressure fluid is released from the back end of thecylinder 23 through the pipe 48, valve 31, pipe 49 to the sump 42 whilefluid is delivered through pipe 41 past the check valve of the valve 40into the front end of the cylinder 23, thus causing the piston 24 andcarriage to feed toward the right to withdraw the tools from the work.

The hydraulically operated piston 24 and its cylinder 23 is of limitedlength, so that the carriage l I cannot be moved the entire length ofthe lathe bed 9. Under some conditions in setting up for Work ofdifferent sizes the carriage 2E! must be shifted along the ways l9 fromthe position shown in the drawings.- For effecting this shiftingmovement, the carriage Il may be locked against movement relative to theways H) by the clamp pin 36 and the pins 21 may then be moved to anunlocked position and then, with the piston 24 in a fixed position, byintroducing pressure fluid into the back end of the cylinder 23 thecarriage 20 will be moved toward the rear end of the lathe bed or byintroducing fluid into the'front end of the cylinder 23 the carriage 20will be moved toward the head stock of the lathe. Thus the carriage 20may be shifted to different positions lengthwise of the lathe, so thatthe carriage H may be operated in difierent areas of the ways I0 of thelathe without the necessity for a hydraulic cylinder having a strokeequal to the full length of the bed.

We desire it to be understood that this invention is not to be limitedto any particular form or arrangement of parts except in so far as suchlimitations are included in the claims.

What We claim as our invention is:

1. In a turret lathe having a work holder, a bed, and a carriage movablealong the bed and provided with a tool carrying head, the combination ofa carriage mounted for lengthwise shifting movement on the side of saidbed, releasable means for securing said last named carriage againstmovement relative to said bed, a cylinder mounted on said last namedcarriage, a hydraulically operated piston working in said cylinder andconnected to the first named carriage, means for securing said firstnamed carriage against movement relative to the bed to hold said pistonand permit changing the position of said cylinder carrying carriagerelative to said bed through the, action of hydraulic fluid acting onsaid cylinder.

2. In a turret lathe having a work holder, a bed, and a carriage movablealong the bed and provided with a tool carrying head, the combination ofa carriage mounted for lengthwise shifting movement on the side of saidbed, releaseable pins for securing said last named carriage againstmovement relative to said bed, a cylinder mounted on said last namedcarriage, a

, hydraulically operated piston working in said 9 bed through the actionof hydraulic fluid acting cylinder and. connected to the first namedcarriage, a pin for securing said first named carriage against movementrelative to the bed to hold said piston and permit changing the positionof said, cylinder carrying carriage relative to said on said cylinder.

3. In a turret lathe having a work holder, 9., bed, and a tool carriagemovable along the bed and provided with a tool carrying head, thecombination of a cylinder carrying carriage, a hy-.

draulic cylinder mounted on said last named carriage, a hydraulicallyoperated piston working in said cylinder and connected to said toolcarriage, means for supplying opposite ends of said cylinder alternatelywith hydraulic fluid to reciprocate said tool carriage including areversing valve mounted on said cylinder carrying carriage,

an oscillatory control member for said valve mounted on said toolcarriage, and a shaft connected to said control member and operatedthereby and having a slidable operating connection with said reversingvalve at any instant and in all positions of feed of said toolcarriagerela tive to said cylinder carriage.

ALPHONS v. HUENNEKENS. GEORGE L. GAVIN.

